DTIC ADA484939: A Perspective on the Numerical and Experimental Characteristics of Multi-Mode Dry-Friction Whip and Whirl

by: Defense Technical Information Center

Publication date: 2008-06-01

Topics: DTIC Archive, Wilkes, Jason C, NORTHROP GRUMMAN SPACE AND MISSILE SYSTEMS CORP REDONDO BEACH CA SPACE TECHNOLOGY, *STATORS, *TURBOMACHINERY, *ROTATION, *ROTOR BLADES(TURBOMACHINERY), NUMERICAL METHODS AND PROCEDURES, TEST EQUIPMENT, THESES, NUMERICAL ANALYSIS, STEADY STATE,

Collection: dticarchive; additional_collections

Language: English

The present work investigates the nature of dry-friction whip and whirl through experimental and numerical methods. Efforts of the author, Dyck [1], Pavalek [2], and coworkers enabled the design and construction of a test rig that demonstrated and recorded accurately the character of multi-mode dry-friction whip and whirl. These tests examined steady state whip and whirl characteristics for a variety of rub materials and clearances. Results provided by the test rig are unparalleled in quality and nature to those seen in literature and possess several unique characteristics that are presented and discussed.